I assume you are referring to the USA.
Here's a report on human rights violations in the USA. It includes discussions about:
prison conditions the practices of solitary confinement (especially for the mentally ill and children), and even the death penalty, are violations of UN sanctioned human rights.
criminal justice the difference in sentencing and police treatment of minorities can be proven to be an inherent bias in the system - and therefore a violation of the right to be 'treated as an equal' and to have the right to a fair trial. This is not only a right from the UN Declaration, but is also repeated in Amendment 14 of the US constitution.
war on drugs the surveillance of drug dealers is often outside the right of an individual to privacy.
rights of non-citizens and migrants under the UN Declaration of Human Rights, all people have the same underlying right to healthcare, freedom to practice religion and freedom from discrimination on the basis of race.
torture during the 'War on Terror' various US groups have been accused of torturing militant personnel.
This is just a snap shot of a few of the 'most prevalent' or 'most routine' violations of human rights in the US. The Amnesty USA link (below) provides some focussed articles for further reading.